Figure 120: Connecting The Grounding Lug To A Switch Mounted On Four Posts; Of A Rack - Juniper QFabric QFX3000-G Hardware Documentation

Table 55: Special Instructions to Follow Before Connecting Earth Ground to a Switch (continued)
Switch Special Instructions
EX4200 NOTE: Some early variants of EX4200 switches for which the Juniper Networks model number on the label
next to the protective earthing terminal is from 750-021xxx through 750-030xxx require 10-24x.25 in. screws.
NOTE: The protective earthing terminal on an EX4200 switch mounted on four posts of a rack is accessible
through the slot on the left rear bracket only if the rack is 27.5 in. (69.85 cm) through 30.5 in. (77.47 cm)
deep for a switch mounted flush with the rack front and 29.5 in. (74.93 cm) through 32.5 in. (82.55 cm)
deep for a switch mounted 2 in. (5.08 cm) recessed from the rack front. See
Figure 120: Connecting the Grounding Lug to a Switch Mounted on Four Posts of a Rack
NOTE: The brackets must be attached to the chassis before the grounding lug is attached. (The brackets
are shown pulled away from the chassis so that the protective earthing terminal is seen.)
EX4300 NOTE: The protective earthing terminal on an EX4300 switch mounted on four posts of a rack is accessible
through the slot on the left rear bracket only if the rack is 27.5 in. (69.85 cm) through 30.5 in. (77.47 cm)
deep for a switch mounted flush with the rack front and 29.5 in. (74.93 cm) through 32.5 in. (82.55 cm)
deep for a switch mounted 2 in. (5.08 cm) recessed from the rack front.
EX4500 NOTE:
or cabinet before attaching the grounding lug to the switch. See Mounting an EX4500 Switch on Four Posts
in a Rack or Cabinet.
NOTE: The protective earthing terminal on an EX4500 switch mounted on four posts of a rack is accessible
through the slot on the left rear bracket only if the rack is 27.5 in. (69.85 cm) through 30.5 in. (77.47 cm)
deep for a switch mounted flush with the rack front and 29.5 in. (74.93 cm) through 32.5 in. (82.55 cm)
deep for a switch mounted 2 in. (5.08 cm) recessed from the rack front.
EX4550 NOTE: The protective earthing terminal on an EX4550 switch mounted on four posts of a rack is accessible
through the slot on the left rear bracket only if the rack is 27.5 in. (69.85 cm) through 30.5 in. (77.47 cm)
deep for a switch mounted flush with the rack front and 29.5 in. (74.93 cm) through 32.5 in. (82.55 cm)
deep for a switch mounted 2 in. (5.08 cm) recessed from the rack front.
EX8216 NOTE: Only one of the two protective earthing terminals needs to be permanently connected to earth
ground.
Copyright © 2018, Juniper Networks, Inc.
1— Protective earthing terminal
2— Side mounting-rail
If you plan to mount your switch on four posts of a rack or cabinet, mount your switch in the rack
Chapter 7: EX4300 Overview
Figure 120 on page 181.
3— Grounding lug
4— Rear mounting-blade
181